Dynamic Save Strategy Exception

[mumuboy]

Somehow, with no change to the guild code, I got this exception using dynamic save strategy:

Exception:
System.AggregateException: One or more errors occurred. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at Server.Guilds.Guild.Serialize(GenericWriter writer)
at Server.DynamicSaveStrategy.<SaveGuilds>b__e(BaseGuild guild, ParallelLoopState state, QueuedMemoryWriter writer)
at System.Threading.Tasks.Parallel.<>c__DisplayClass32`2.<PartitionerForEachWorker>b__30()
at System.Threading.Tasks.Task.InnerInvokeWithArg(Task childTask)
at System.Threading.Tasks.Task.<>c__DisplayClass7.<ExecuteSelfReplicating>b__6(Object )
--- End of inner exception stack trace ---
at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
at System.Threading.Tasks.Task.Wait()
at System.Threading.Tasks.Parallel.PartitionerForEachWorker[TSource,TLocal](Partitioner`1 source, ParallelOptions parallelOptions, Action`1 simpleBody, Action`2 bodyWithState, Action`3 bodyWithStateAndIndex, Func`4 bodyWithStateAndLocal, Func`5 bodyWithEverything, Func`1 localInit, Action`1 localFinally)
at System.Threading.Tasks.Parallel.ForEachWorker[TSource,TLocal](IEnumerable`1 source, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Action`3 bodyWithStateAndIndex, Func`4 bodyWithStateAndLocal, Func`5 bodyWithEverything, Func`1 localInit, Action`1 localFinally)
at System.Threading.Tasks.Parallel.ForEach[TSource,TLocal](IEnumerable`1 source, Func`1 localInit, Func`4 body, Action`1 localFinally)
at Server.DynamicSaveStrategy.SaveGuilds()
at Server.DynamicSaveStrategy.Save(SaveMetrics metrics, Boolean permitBackgroundWrite)
at Server.World.Save(Boolean message, Boolean permitBackgroundWrite)
at Server.Misc.AutoSave.Save(Boolean permitBackgroundWrite)
at Server.Timer.Slice()
at Server.Core.Main(String[] args)
---> (Inner Exception #0) System.NullReferenceException: Object reference not set to an instance of an object.
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at Server.Guilds.Guild.Serialize(GenericWriter writer)
at Server.DynamicSaveStrategy.<SaveGuilds>b__e(BaseGuild guild, ParallelLoopState state, QueuedMemoryWriter writer)
at System.Threading.Tasks.Parallel.<>c__DisplayClass32`2.<PartitionerForEachWorker>b__30()
at System.Threading.Tasks.Task.InnerInvokeWithArg(Task childTask)
at System.Threading.Tasks.Task.<>c__DisplayClass7.<ExecuteSelfReplicating>b__6(Object )<---

Using .NET Framework 4.0. Was using DualStrategy before. Odd thing is, Dynamic Save works fine on the test machine which is also a quad core. Difference between the production and test bed being that players were logged into the production when this occurred.

Ideas?

 

[mumuboy]

I could change all serializations of List<> to use lambda syntax like HashSets but I doubt this will solve the underlying issue (whatever that is).